18F-FDG PET/CT Findings in Metastatic Pilomatrix Carcinoma.

We describe a rare case of metastatic pilomatrix carcinoma with distant metastases 10 months after diagnosis. A 37-year-old woman was diagnosed with pilomatrix carcinoma by excisional biopsy from the occipital region and referred to us for F-FDG PET/CT examinations at the time of diagnosis and 10 months after diagnosis. The first PET/CT did not show any pathological activity, whereas the second PET/CT showed multiple intensive F-FDG uptakes in the right lung parenchyma, right hemithorax pleura, liver, and bones.